If a perfect black body does not reflect back light, how can we see them?

Answer 1

Radio waves

Answer 2

Lamp black is the nearest to black body. No object is perfectly black.

Black means lack of color.

Most objects which looks black, infact, are not perfectly black.

Persons having color blindness i.e. who cannot sense red blue and green ( very rare case) will view the objects as black and white.

Apart from colors we have white, grey and black which are not defined as colors.

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Thus objects which are black in nature scatters lights of low brightness and looks black.

There are many range of blackness.

Further if really an object is perfecly black we cannot judge the three dimensional shape of the object. We can view only the surronding objects.

In a closed dark room we are not able to see any thing.

Answer 3

On any merchandise at the same time as mild falls 3 important issues ensue, one is mirrored image, the different one is refraction and the 0.33 one is scattering of sunshine. The degree of mirrored image, refraction and scattering relies upon on many elements of the cloth on which mild falls. in effortless words completely black bodys soak up all mild rays :others replicate or scatter some element of sunshine falling on them. at the same time as walls are painted with modern paints operating example eco-friendly, you are able to discover eco-friendly coloration of the wall and collectively we are able to work out scattered or pondered mild of alternative products interior the wall. Take a black colored dish or plate and pour water into it. The products that are contained in the water isn't seen. notwithstanding the water floor reflects the products above the water floor. notwithstanding the colors of the object will variety very a lot. A pink colored merchandise will seem darkish gray and eco-friendly colored products may have a fadded coloration.

Answer 4

Peter K is right. A black body will emit it's own light, if it's hot enough. And as long as it's temperature is above zero degrees absolute, it will still emit infrared or radio frequencies which may be detected.

Answer 5

black bodies are actually defined as those things that completely absorb e-mag radiation, not just light.
And we can tell where they are by virtue of the fact that we CAN see the boundary by seeing what IS detectable. that is, suppose you had a hole in the ground. you splash paint around. consider the hole the black body. when you splash paint on it, it just disappears down the hole. but the non-hole portion DOES get paint on it. and by defining all regions immediately around the black body that are definitely NOT the black body, you can determine the extents of it. savvy?

I've only just covered the concept of black bodies and grey bodies *today* in my class, so ..that's all I've got to offer about it right now

Answer 6

A black body radiates just as well as it absorbs light. If you heat a black body up then it will glow.

Answer 7

Who told you you can see them..

now..You can imagin how many perfect bodies around you ..

whatever you see it is becoze of reflection only...

Answer 8

You see a black gap where there should be something

Answer 9

We can't see them. So they appear an empty black space.

Answer 10

We are never able to see them ..........but yes there are emmissions from black holes as well as and in another phenomenon some light which manages to pass by its side but manages to escape its gravity are also used to analyse them........

OOPs sorry i thought it was black hole.........but still means same.............and nearly works the same.